1) Added non-published event property for the Host within the Plug-in class that fires when a plug-in calls broadcast. ->All loaded plug-ins<- can get messages through plug-in manager. Nothing special need be done.

2) Added published event property in Host that fires when messages are received. Originator does not receive it's own messages. (There's no message looping).

*Tested with D7 and D2010. Both work. Not checked for leaks.
*Recommended FastMM (FastMM497.zip) usage for ShareMem replacement.
*D2010 will upgrade the D7 project.
*All output files need to be outputted to same directory.
*Basic BDE and demo tables required for demo project.

*In the demo project you find most of work being done by the plug-ins with
the host controller just listening. Unlike (I think) the other demos this one
operates mostly plug-in to plug-in. The form in the demo also has easy
access to the plug-in hosting it. I think the demo mimics structurally closer too something I might write so that's why I made it.